def get_sum(n):
    s=0
    for i in range(n+1):
        s += i
    print(f'1-{n}的累加和为:{s}')

get_sum(10)

def happy_birtyday(name, age):
    print('祝'+name+str(age)+'岁生日快乐')

happy_birtyday(age=18, name='chl')

def happy_birtyday2(name='chl', age=18):
    print('祝'+name+str(age)+'岁生日快乐')

happy_birtyday2()
